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Ball Valve Three Piece Design Full Port, Screwed End & Socket Weld End
 
 
Manufacturing Standard BS 5351
Testing Standard BS 5146
Product Range 15 to 50mm
End Connection
 Screwed End BSPT/NPT/BSP Female Ends & Socket Weld End.
 
Salient features
 full port
 blow out proof stem
 low torque
 floating ball
 mirror finish ball
 quarter turn shut off
 100% interchangeability
 variety of materials of:
 s.s. astm, a 351, gr cf8 (304), cf3 (304l), cf8m (316), cf3m (316l), cf8c (321), cn7m (alloy 20), astm 216, gr wcb(cast steel)
Material specifications
No. Part name Material
1 Body Astma  :  astma  :  astma
2 Body connector 351 cf8 :  351cf8m  :  216 wcb
3 Connector Ptfe
4 Ball Aisi 304, 316, astma cf8-cf8m
5 Stem Aisi 304, aisi 316
6 Ball seat Ptfe
7 Steam seal Ptfe
8 Gland packing Ptfe
9 Gland Aisi 304, aisi 316
10 Gland nut Ss 304
11 Lever Ss / ms
12 Lever nut Ss 304
13 Lever sleeve Pvc
14 Body studs & nuts Ss 304 / m.s.
 
Dimensions data in mm
Size L F/b Ends d
15 70 12.5 1/2"
20 74 19 3/4"
25 88 25 1"
40 102 38 1/2"
50 117 51 2"
Dimensions of socket weld end in mm
Size 15 20 25 40 50
Socket size 21.8 27.1 33.8 48.7 61.1
 
Test pressure (hydrostatic)
Class 150 lbs 300 lbs
Body 450 psig or 31.5 kg/cm 2g 1100 psig or 77 kgcm 2g
Seat 315 psig or 22 kg/cm 2g 800 psig or 56 kgcm 2g
Test pressure (pneumatic)
Class 150 lbs
Seat 80 psig or 5.5 kg/cm 2g
 
Minimum pressure / temperature seat ratings
Nominal size of valve
(dn)		 Service temperature ( oc)
-30 to 40 50 75 90 100 125 150 175 200 230
Full bore Minimum non-shock pressure
  Bar Bar Bar Bar Bar Bar Bar Bar Bar Bar
8 to 20 69 66 56 51 47 38 29 20 11 0
25 to 65 50 49 48 48 47 38 29 20 11 0
80 to 100 42 42 42 42 39 32 24 17 9 0
150 31 31 31 31 29 23 18 12 7 0
200 to 400 21 21 21 21 20 16 12 8 5 0
Note : the pressure/temperature ratings shown are based on seat rings made from ptfe resins without fillers, of virgin material completely free of reclaimed processed material. 1 bar = 1.0197 kg/cm2
[data sourced from bs 5351]
 
 
 
 
Copyright © 2006 GM Engineering.All Rights Reserved. KAL STUDIOS Creation